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03-08-2017, 09:40 PM
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#1 |
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Registered User
Join Date: Feb 2017
Location: Pittsburgh, PA
Posts: 1
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1977 K15 fan blade
Done a lot of searching and cannot seem to locate exactly what fan should be on this truck. PO put a new 350 crate motor in it with a non clutch 4 blade fan on it. I ordered the sever duty Hayden clutch for it, but can't seem to find the correct fan now. Does anyone have a part number or website where I can get one? Also been searching salvage yards but without any luck. Thanks in advance!
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03-09-2017, 08:14 AM
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#2 |
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Registered User
Join Date: Oct 2013
Location: Maine
Posts: 2,334
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Re: 1977 K15 fan blade
Was your K15 a 305 truck? Just curious, my 77 C10 305 came with a 4 blade non clutch fan. Yours may be the original. I can't help with a part number for a bigger fan though.
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76 Chevy K20 76 GMC K15 77 Chevy C10 77 Chevy K10 |
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03-09-2017, 12:34 PM
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#3 |
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Registered User
Join Date: Aug 2012
Location: Oklahoma City, OK
Posts: 2,477
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Re: 1977 K15 fan blade
My 75 C10 with AC came with a 7 blade fan. 5 blades are common as well. Don't limit your junkyard runs to the truck section. I think the fan blades were common between the RWD cars, trucks and vans from that era. Don't think there is any difference between K and C series fan blades.
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03-09-2017, 02:35 PM
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#4 |
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Senior Member
 
Join Date: Jul 2000
Location: North Texas
Posts: 3,423
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Re: 1977 K15 fan blade
You should be able to find the correct fan here:
https://derale.com/products/belt-dri...black-1-detail
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Mike 1969 C10 LWB -- owned for 34 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 23 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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03-12-2017, 05:15 PM
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#5 |
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Registered User
Join Date: Oct 2015
Location: Ottawa, Ontario, Canada
Posts: 750
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Re: 1977 K15 fan blade
How big is your rad 3 core or a two core, is it copper or is it alum. Do you have A/C.
How big is the cam in the crate motor. Are you using the truck towing. How heavy is your truck / rear gear low or high A clutch 5 blade fan over a 4 blade solid steel fan is better for hp after idel on highway moving.( above idel the clutch freewheels around 900 to 1000 up to 1200 rpm, when you in stop or very slow traffic lock up then the fan works.) There is lots of combo. You want the blades to be 1/4" in side the shroud to get the best pull out of them.
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 1977 REG cab Long Bed with a 1984 Front Clip, 82 305 .60 over 9.0.1 flat top pistons, 4bbl, TH350, w/84 SS-intake & cam , w/ 1977 big block rad, 1975 gear box, 1984 master w/ metric fittings top & SAE fitting @ portion block, 1975 3.42 gear open diff. Duel 77-87 Factory air cleaner, duel inlet from rad support . Down sized 9' to new 8' Steel flat bedWas a 77 454 w/308 gear. Taken out 550 lbs. up front with motor clip change. |
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